I don't use a bookmark. The problem must be what you say: It's temporary (all is fine if I just goes through it very fast). But if it's, say, 3 pages to read, and I don't get at it quickly, the third page is lost when I get to it. Today I'm back after a weeks vacation, and the only way I can get sure to read everything is to immediately walk through and open 9 windows, one for each search page.
It could all be remedied if there was an option to get all new posts on a single long, continous page.

(I would have lost your reply to this thread if I hadn't used the workaround described above! :-))